A signup card composition: a real shadcn-style card (header, labeled Full Name / Email / Password / Confirm fields, primary + Google-outline buttons, sign-in footer) whose cursor fills each field top-to-bottom, then clicks Create account (hover → press → loading → success) as a success toast slides in. A pure orchestrator — every channel comes from a composed primitive's transition hook.
pnpm dlx shadcn@latest add "https://www.remocn.dev/r/signup-flow.json"